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BREAKING – A significant Earth-directed solar flare and associated coronal mass ejection (CME) just occurred on Friday evening. There is an increasing chance of geomagnetic storms and the potential for a display of the aurora borealis (northern lights) sometime Sunday night into Monday. A "solar flare" is a flash...

37,948 次观看 • 1 年前 •via X (Twitter)

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*SEVERE geomagnetic storm possible with U.S. aurora borealis display* *Northern lights possible at mid-latitudes early Sunday morning or Sunday night* *Specifics TBD – map coming later today* On Friday evening Eastern time, a major solar flare occurred from sunspot #4100. A sunspot is a bruise-like discoloration on the sun that throbs and pulsates with energy. Following the solar flare, which is a flash of light and radiation, a significant CME — or coronal mass ejection — was hurled directly toward Earth. Imagine a shockwave of magnetism and high-energy particles rippling through space like an interstellar tsunami. It’s heading for us at speeds around 1,200 miles per second — that’s very fast! We know it’s Earth-directed because our sensors indicate a “full halo” CME. See the solar material appearing to fan out in all directions? That’s an indicator it’s Earth-bound. It’s like if a train is coming right at you — you’d only see the train getting bigger. Once this electromagnetic shockwave reaches Earth, the energy will be absorbed and dissipated by our magnetic field. It will be transformed into visible light — the aurora. Since there’s a LOT of energy, we’ll probably get the aurora borealis (the northern lights) down to the mid latitudes. This could mean parts of the central United States, the Midwest, the Mid-Atlantic and perhaps as far south as northern California. There’s even a chance that parts of the Mid-South could see the aurora IF a direct impact occurs and the orientation of Earth’s magnetic field cooperates. Scientists at the Space Weather Prediction Center in Boulder, Colorado are working to iron that out.

Matthew Cappucci

10,381 次观看 • 1 年前

🚨 PARKER SOLAR PROBE JUST FOUND HIGH-ENERGY PARTICLES NEAR THE SUN THAT NO MODEL PREDICTED AND WE DON’T KNOW HOW THEY GOT SO ENERGETIC. During its close passes through the solar corona, NASA’s Parker Solar Probe detected protons accelerated to energies around 400 keV roughly 1,000 times higher than current models of magnetic reconnection at the heliospheric current sheet could explain. The particles appear to be trapped and energized inside magnetic islands that form and merge during reconnection events at the current sheet (the vast surface where the Sun’s magnetic field flips polarity). This mechanism was not expected to produce such high energies so close to the Sun. Why this matters: • It reveals a previously unknown or underestimated source of energetic particles right in the solar corona • Existing models of solar energetic particles have focused mainly on shocks from coronal mass ejections — this suggests reconnection can also be a powerful accelerator • The same process may be contributing more to coronal heating than previously calculated • It has implications for space weather forecasting, since these particles can affect spacecraft and astronauts The deeper implication: Parker is showing us that the physics of the near-Sun environment is more energetic and complex than our models assumed. Magnetic reconnection long known as an important process appears capable of accelerating particles to surprisingly high energies through the merging of magnetic islands. This doesn’t just tweak our understanding of the Sun; it may force revisions in how we model particle acceleration across many astrophysical environments. We’re still in the early stages of understanding what Parker is revealing, but it’s already clear that the corona is more violent and dynamic than we thought. How do you think this discovery might change our models of space weather or solar physics in the coming years? Follow for more updates from Parker Solar Probe and the evolving picture of our Sun.

TheNewPhysics

16,192 次观看 • 26 天前

🚨 CHINA IS RACING TO BUILD A SPACE SOLAR POWER PLANT THAT COULD BEAM ELECTRICITY FROM ORBIT TO EARTH. Scientists at Xidian University have successfully tested a ground-based system that can wirelessly transmit kilowatt-level power over 100 meters using microwaves. Their ultimate goal is far more ambitious: placing large solar power stations in geostationary orbit (36,000 km up), where sunlight is available 24/7 with no weather or atmosphere blocking it. The project, called Zhuri (“chasing the sun”), uses mirrors to concentrate sunlight onto solar panels, converts the electricity into microwaves, and beams it down to a receiving antenna (rectenna) on Earth. Why this matters: • In space, solar energy is up to 6 times more efficient than on Earth because there’s no night, clouds, or atmospheric filtering • A single large space solar station could theoretically generate gigawatts of continuous clean power enough for millions of homes • The team has already proven the system can beam power to multiple moving targets at once • China is now among the world leaders in this technology, alongside the US and Japan The deeper implication: Space-based solar power has been a dream for decades because it could provide truly baseload renewable energy. While the technical and financial challenges are enormous (building massive structures in orbit, precise microwave beaming, and safety), steady progress like this brings the concept closer to reality. If successful, it could fundamentally change how humanity generates and distributes energy moving power collection off the planet entirely. Near-term applications could include wirelessly charging satellites or powering future lunar bases. Do you think space-based solar power will become a major energy source in the coming decades, or will it stay too expensive and complex? Follow for more frontier energy and space technology developments.

TheNewPhysics

15,361 次观看 • 27 天前